function insertChat(css) {
	var url = encodeURIComponent(window.location.href);
	document.write('<iframe src="http://jeeeyul.appspot.com/chat.jsp?url='
			+ url + '" width="100%" frameborder="0" border="0"></iframe>');
	
	console.log(url + " 채팅 룸 삽입");
};